Would like irccat functionality

[jd-boyd]

Replicate the main functionality of irccat (https://github.com/RJ/irccat).

    echo "Hello World" | netcat -q0 localhost 12345

Would cause jenni to send "Hello World" to the default channel.

    echo "@nick Hello World" | netcat -q0 localhost 12345

Would cause jenni to send "Hello World" to the user with nick

    echo "#new_chan Hello World" | netcat -q0 localhost 12345

Would cause jenni to send "Hello World" to the #new_chan channel.

[myano]

I think this functionality would first require a setup where jenni isn't running in a shell but has been pushed as a background process.

I believe something like this would be in order first, https://github.com/sbp/phenny/pull/12